Automatic gate.



MPMCATION FILED BULY 13. 19W. d Patente@ a, 3L 19M 3 SHEETS-SHEET 1.

my. l.

co. Fnomuma, wasumamn. a c.

A. HAWKINS.

AUTOMATIC (ma PPLCATlON FILED IULY I3. |9l8.

Patented Dec. 31,1918.

LQSQL as E T @www 224012 llawjz'n; hm. y v www A. HAWKINS.

AUTOMATIC GAIE.

v APPLICATION msn JULY 13.- ma. 2 9,751, Patented Dec. 31, 1918.

v v a sums-sain s.

gmEW/M/ @Hof/mig berta and Dominion of Canada,

AARON HAWKINS, OF ROSEBUD CREEK, ALBERTA, CANADA.

AUTOMATIC GATE.

Specification of Letters Patent.

lPatenrted Dec. 31, 1918.

Application filed .Tuly 13, 1918. Serial No. 244,735.

To all whom it may concern.'

Be it known that I, AARON HAWKINs, a citizen of the Dominion 0f Canada,residing at Rosebud Creek, in the Province of Alhave invented new anduseful Improvements in Automatic Gates, of which the following is aspecification.

This invention relates to an automatic gate, and one object is toprovide a gate movable in a vertical plane and controlled by a pluralityof platform members elevated at their approaching ends at a pointadjacent to the lower portion of the gate when the gate is in closedposition.

A further object is to provide, in connection with a device of the typeindicated, certain novel operating means including a crank shaftcontrolling a toggle joint structure or the like which in turn controlsthe position of the approaching ends of the platform members, andcontrols the position of the gate with reference to the aforesaid endsof the platform members.

A still further object is to provide means for operating the crank shaftand the toggle joint structure by a trip or trips when the latter areengaged by the wheel of a wagon moving over the platform.

With the foregoing and other objects in view, the invention consists inthe novel construction, combination and arrangement elements hereinafterdescribed and claimed.

In the accompanying drawings:

Figure 1 is a view chiefly in top plan.

Fig. 2 is a vertical section.

Fig. 3 is a vertical section from another angle.

Fig. 4 is a side elevation.

Fig. 5 is a detail in vertical section and showing in elevation certainstructure below the platform.

Figs. 6 and 7 are details of construction described below.

The frame on which the platform is mounted is designated 10 andcomprises a plurality of longitudinal side bars and end bars or crosspieces, the latter being designated 13 and 14. A central transverse baror plate member is designated 15 and supports the operating mechanismfor the pivotally or hingedly mounted platforms or platform members.These members are designated 16 and 17 and the outer ends thereof aresupported in cutaway portions 18 and 19 in cross pieces 13 and 14.Platforms 16 and 17 each carry a hinged member such as 20, theoppositely located hinged members of the respective pairs being adjacenteach other and being retained by a transverse bar 22. The operation ofthis bar, that is the shifting of the bar to control its upper and lowerpositions, effects the control of the platform members and the controlof the gate.

Bar 22 passes through slots 23 in the lower ends of the uprights 24 and25 constituting the gate frame. Bar 22 is engaged by a member 25 of thetoggle joint connection 26, the other arm of the toggle joint beingdesignated 27. Arm 25 is provided with an aperture 28 through which bar22 loosely passes.

The toggle joint is controlled by means of a transverse pin` 30 operatedby crank shafts 31 arranged in alinement and eX- tending transverselyacross the frame 10. Each crank shaft is mounted to rotate in bearings32 suitably supported.

Connected with each crank shaft is an operating rod 33 or 34, as thecase may be, the rods extending outwardly and longitudinally of theframe 10 and each of these rods being operated by a trip such as 35,these trips being pivotally mounted at the outer ends of the platformmembers 16 and 17. f

When the gate is closed the central portions of the platform members areelevated, and the toggle joint is in a position with its arms extended.The operation of either trip 35 by contact due to the passage of a wagonwheel over the platform, partly rotates the crank shaft connectedtherewith and collapses the toggle joint causing transverse bar 22 tofall and permitting the adjacent ends of the platform members 16 and 17to drop to a horizontal position.

The gate frame including uprights 24 and 25 is connected at its upperportion by means of transverse members 40, and the gate 41 operatesbetween the uprights 24 and 25, the latter being provided with guides 43and 44. engaged by wheels or rollers 45 mounted on the gate.

Near the lower portion of the gate I connect the lazy-tongs 47 forcontrolling the gate. The upper elements of the lazy-tongs are connectedby means of a pivot 48, and at the point where vsaid upper elements arepivotally connected with the adjacent elements of the lazy-tongstructure, I also Connect operating arms 50 and ,51, the latter beingpivotally -connected attheir outer ends with leversV 52 and 53 pivotallymounted on the uprights 24 and 25.

Levers 52 and vv53 may a lseries'of notches 54 and may also be providedwith a series of apertures 55, permitting of the adjustment of thefleXibleconnecting members 57 thus permitting their location vat asuitable point, and also permitting of theV adjustment of the pivotalmounting of the levers 52 vand 53. Connecting of the toggle joint.

tilting apart of members 57 are controlled by meansof the transverse bar22, for the purpose'of operating the gate when said bar 22 is operatedand carried downwardly by the collapse VThis downward movement of thebar 22 produces a' corresponding downward movement ofthe outer ends ofllevers 52 and 53 and raises the gate in view of the lazy-tongconnection above specified. Y

The connecting` members'57 may include turn-buckles or other adjustingdevices.

The weight vofthe gate is to be sufficient to overbalance the platformmembers and effect the automatic closing ofthe gate. If desired the gatecan be adjusted so that when man approximately closed position, it willstill leave suficient space for small animals to pass'through thegateopening.

What is claimed'is:

l. In a vdevice of the class described, a main frame, aplurality ofpivotally mounted platform members, the ends of which approach-eachother, a transverse bar-constisaid pivotal mounting, a toggle jointcontrolling the bar, a crank shaft controlling the operation of thetoggle joint, a trip mounted on the platform and controlling thecrankshaft, a gate frame eX- tending vertically from the main frame, aslidable gate therein, a plurality oflevers mounted on the gate frameand having their inner ends spaced apart, a lazy-tong structurelconnected with the spaced lends of the levers and with the gate, andmeans con- Gbpies of thisv patent maybe obtained-for be provided wative` cents each, by addressing the Washington,y D. C.

necting the outer ends of the levers with the transverse bar controlledby the toggle joint.

V2. In a device of the class described, a main frame including atransverse bar mounted at the central portion thereof, a crank shaftmounted on said bar, a toggle joint controlled by the crank shaft, a bareX- ytending across the main frame and pivotally connected with one armof the toggle joint, said last named bar being controlled by the togglejoint and effecting movement ofthe bar in a substantially verticalplane, platform members carriedY by the main frame and approaching' eachcent to the bar-operated bythe toggle-joint and hingedly connectedwithisaid bar, a trip for operating the crank shaft,.'a gate-mounted-for vvertical movementl above the 'platother at a point adjaform,-alazy-tong structure, connected with the gate, a lever connected with theupper portion ofthe lazy-tong structure and adjustable deviceAconnecting the lever with the transverse bar joint. Y Y

3. VIn a device of the classl described, a main frame, a vertical'frame,guides carried by the membersof the vertical frame, a gate slidablylmounted 'in the guides, a lazy-tong structure, connected with the gateat the lower-portion thereof, means forV AARON HAwKnis.

Witness J. B. SMITH. n

" Commissioner of latenti,

operated by theV toggle the lazy-tongV structure and the

